This is a weird and complex suggestion but I think that your breathing style and demon art should develop with your level, like how before lvl 60, explosion arts E is a smaller explosion but then gets bigger, and I think at certain levels your breathing or demon changes to get stronger
Example: temari you only have 2 arms and if the max lvl is let's say 300, every 50 levels you gain 2 pairs of arms which I crease the count of temari your throw